Board Changes

                                     10-11 CHARTERHOUSE SQUARE, LONDON EC1M 6EE

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16 July 2024

BOARD CHANGES

Diploma PLC, the international value-add distribution group, announces that in accordance with its succession planning and as outlined in the announcement released on 30 May 2023 regarding the appointment of Jennifer Ward, Jennifer has now been appointed as Chair of the Remuneration Committee with immediate effect. Accordingly, Andy Smith has stepped down from the Board and as Remuneration Committee Chair following over nine years of service.

Furthermore, as outlined in the announcement released on 20 December 2023 relating to the appointment of Janice Stipp, Janice has today succeeded Anne Thorburn as Chair of the Audit Committee. Anne will remain on the Board as Senior Independent Director to enable an orderly transition of the role of Senior Independent Director in due course.

This announcement is made pursuant to LR 9.6.11R of the Listing Rules.

J Morrison

Group General Counsel & Company Secretary

Diploma PLC

For further information, please contact:

Further information on Diploma PLC can be found at www.diplomaplc.com

LEI: 2138008OGI7VYG8FGR19